// Copyright (C) 2019-2020 Zilliz. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed under the License
// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
// or implied. See the License for the specific language governing permissions and limitations under the License.

#include <chrono>
#include <map>
#include <memory>
#include <string>
#include <thread>
#include <gtest/gtest.h>
#include <fiu-local.h>
#include <fiu-control.h>

#include "config/ServerConfig.h"
#include "metrics/utils.h"
#include "metrics/Metrics.h"

TEST_F(MetricTest, METRIC_TEST) {
    fiu_init(0);

#ifdef MILVUS_GPU_VERSION
    FIU_ENABLE_FIU("SystemInfo.Init.nvmInit_fail");
    milvus::server::SystemInfo::GetInstance().initialized_ = false;
    milvus::server::SystemInfo::GetInstance().Init();
    fiu_disable("SystemInfo.Init.nvmInit_fail");
    FIU_ENABLE_FIU("SystemInfo.Init.nvm_getDevice_fail");
    milvus::server::SystemInfo::GetInstance().initialized_ = false;
    milvus::server::SystemInfo::GetInstance().Init();
    fiu_disable("SystemInfo.Init.nvm_getDevice_fail");
    milvus::server::SystemInfo::GetInstance().initialized_ = false;
#endif

    milvus::server::SystemInfo::GetInstance().Init();
    milvus::server::Metrics::GetInstance().Init();

    std::string system_info;
    milvus::server::SystemInfo::GetInstance().GetSysInfoJsonStr(system_info);

//    static const char* group_name = "test_group";
//    static const int group_dim = 256;
//
//    milvus::engine::meta::CollectionSchema group_info;
//    group_info.dimension_ = group_dim;
//    group_info.collection_id_ = group_name;
//    auto stat = db_->CreateCollection(group_info);
//
//    milvus::engine::meta::CollectionSchema group_info_get;
//    group_info_get.collection_id_ = group_name;
//    stat = db_->DescribeCollection(group_info_get);
//
//    int nb = 50;
//    milvus::engine::VectorsData xb;
//    BuildVectors(nb, xb);
//
//    int qb = 5;
//    milvus::engine::VectorsData xq;
//    BuildVectors(qb, xq);
//
//    std::thread search([&]() {
////        std::vector<std::string> tags;
////        milvus::engine::ResultIds result_ids;
////        milvus::engine::ResultDistances result_distances;
//        std::this_thread::sleep_for(std::chrono::seconds(1));
//
//        INIT_TIMER;
//        std::stringstream ss;
//        uint64_t count = 0;
//        uint64_t prev_count = 0;
//
//        for (auto j = 0; j < 10; ++j) {
//            ss.str("");
//            db_->Size(count);
//            prev_count = count;
//
//            START_TIMER;
////            stat = db_->Query(group_name, tags, k, qb, qxb, result_ids, result_distances);
//            ss << "Search " << j << " With Size " << (float)(count * group_dim * sizeof(float)) / (1024 * 1024)
//               << " M";
//
//            for (auto k = 0; k < qb; ++k) {
////                ASSERT_EQ(results[k][0].first, target_ids[k]);
//                ss.str("");
//                ss << "Result [" << k << "]:";
////                for (auto result : results[k]) {
////                    ss << result.first << " ";
////                }
//            }
//            ASSERT_TRUE(count >= prev_count);
//            std::this_thread::sleep_for(std::chrono::milliseconds(100));
//        }
//    });
//
//    int loop = 100;
//
//    for (auto i = 0; i < loop; ++i) {
//        if (i == 40) {
//            xq.id_array_.clear();
//            db_->InsertVectors(group_name, "", xq);
//            ASSERT_EQ(xq.id_array_.size(), qb);
//        } else {
//            xb.id_array_.clear();
//            db_->InsertVectors(group_name, "", xb);
//            ASSERT_EQ(xb.id_array_.size(), nb);
//        }
//        std::this_thread::sleep_for(std::chrono::milliseconds(20));
//    }
//
//    search.join();
}

TEST_F(MetricTest, COLLECTOR_METRICS_TEST) {
    auto status = milvus::Status::OK();
    milvus::server::CollectInsertMetrics insert_metrics0(0, status);
    status = milvus::Status(milvus::DB_ERROR, "error");
    milvus::server::CollectInsertMetrics insert_metrics1(0, status);

    milvus::server::CollectQueryMetrics query_metrics(10);

    milvus::server::CollectMergeFilesMetrics merge_metrics();

    milvus::server::CollectBuildIndexMetrics build_index_metrics();

    milvus::server::CollectExecutionEngineMetrics execution_metrics(10);

    milvus::server::CollectSerializeMetrics serialize_metrics(10);

    milvus::server::CollectAddMetrics add_metrics(10, 128);

    milvus::server::CollectDurationMetrics duration_metrics_raw(milvus::engine::meta::SegmentSchema::RAW);
    milvus::server::CollectDurationMetrics duration_metrics_index(milvus::engine::meta::SegmentSchema::TO_INDEX);
    milvus::server::CollectDurationMetrics duration_metrics_delete(milvus::engine::meta::SegmentSchema::TO_DELETE);

    milvus::server::CollectSearchTaskMetrics search_metrics_raw(milvus::engine::meta::SegmentSchema::RAW);
    milvus::server::CollectSearchTaskMetrics search_metrics_index(milvus::engine::meta::SegmentSchema::TO_INDEX);
    milvus::server::CollectSearchTaskMetrics search_metrics_delete(milvus::engine::meta::SegmentSchema::TO_DELETE);

    milvus::server::MetricCollector metric_collector();
}


